<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>发光按钮</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
<a href="#">
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  <span></span>
  Neon button
</a>
<a href="#">
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  <span></span>
  Neon button
</a>
<a href="#">
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  <span></span>
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  Neon button
</a>
</body>
</html>
